Home / 13,688.32-20,527.44-4,921.12

Finding the Fourth Proportional to 13,688.32, 20,527.44 and 4,921.12

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Solution

The fourth proportional to 13,688.32, 20,527.44 and 4,921.12 is: 7,379.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.32 : 20,527.44 = 4,921.12 : x
  2. Step 2: Convert to fraction form
    13,688.32/20,527.44 = 4,921.12/x
  3. Step 3: Cross multiply
    13,688.32x = 20,527.44 × 4,921.12
  4. Step 4: Simplify right side
    13,688.32x = 101,017,995.53
  5. Step 5: Solve for x
    x = 101,017,995.53/13,688.32
  6. Step 6: Final answer
    x = 7,379.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.